Device for connection of fluid pressure gauge to pipeline

摘要

The invention concerns a device for connecting a fluid-pressure-measuring apparatus to a pipeline with a clamping collar which can be clamped in a radially sealing manner to the pipeline. In one half of the clamping collar an axially guided needle, which is directed radially to the pipeline casing, is guided in a restricted axially displaceable manner. The needle can be displaced axially by means of a threaded spindle whose thread is connected to the clamping collar half, the threaded spindle being directed coaxially to the longitudinal axis of the needle. The object of the invention is to prevent as far as possible the risk of the needle's breaking. To that end, the threaded spindle (6) has a coaxial blind bore (8) into which the shank (9) of the needle (5) can be inserted coaxially. Disposed between the base (12) of the blind bore (8) and the end face (13) of the shank (9) of the needle (5) facing the base (12) are centring means (14) which centre the needle (5) automatically and without force.